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| [CA-1995-14] | "Telnetd Environment Vulnerability" |
| [Dowd 2006] | Chapter 10, "UNIX II: Processes" |
| [IEEE Std 1003.1:2013] | Chapter 8, "Environment Variables" XSH, System Interfaces, confstr |
| [ISO/IEC 9899:2011] | Subclause 7.22.4, "Communication with the Environment" |
| [Viega 2003] | Section 1.1, "Sanitizing the Environment" |
| [Wheeler 2003] | Section 5.2, "Environment Variables" |
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